[SciPy-User] Mean arrivals per time unit -> Time between consecutive arrivals

[nicky van foreest]

Hi Ram,

YOu should take the interarrival time between two consecutive arrivals
to be exponentially distributed with rate lambda, where lambda is the
arrival rate. LIke this the number of arrivals in a fixed period is
Poisson distributed. I never tried, but I suppose scipy contains a
module to generate exponentially distributed rv's.

Nicky

2009/11/25 Ram Rachum <cool-rr at cool-rr.com>:
> Hello,
>
> I've just started using scipy/numpy for some queue theory. I have a queue for
> which the arrival rate is a Poisson distribution. I also have the mean number of
> arrivals per time unit.
>
> I looked around SciPy and I saw I can use scipy.stats.poisson. I was happy that
> it could make a random variable for number of arrivals per time unit. But I want
> the time between consecutive arrivals, as a random variable.
>
> Does anyone know how I can get that?
>
> Thanks,
> Ram.
>
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